THE MOLECULAR BASIS OF INHERITANCE
STRUCTURE OF NUCLEIC ACIDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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mRNA
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DNA
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tRNA
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rRNA
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Detailed explanation-1: -tRNAs (transfer RNAs) carry amino acids to the ribosome. They act as “bridges, ” matching a codon in an mRNA with the amino acid it codes for.
Detailed explanation-2: -Each tRNA has its corresponding amino acid attached to its end. When a tRNA recognizes and binds to its corresponding codon in the ribosome, the tRNA transfers the appropriate amino acid to the end of the growing amino acid chain.
Detailed explanation-3: -tRNA molecules bind to the ribosome in a solvent-accessible channel at the subunit interface. Three binding sites for tRNA, called the aminoacyl site (A site), peptidyl site (P site), and exit site (E site), have been identified on both the large and small subunit (Fig.
Detailed explanation-4: -During protein synthesis, tRNAs with attached amino acids are delivered to the ribosome by proteins called elongation factors, which aid in association of the tRNA with the ribosome, synthesis of the new polypeptide, and translocation (movement) of the ribosome along the mRNA.